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, lynchpin
a pin placed transversely through an axle to keep a wheel in position
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a wedge-shaped rod that fits into a hole in a part and prevents another part from shifting to one side while fastened to the first part. The shape of a linchpin prevents the pin from falling out of the hole. Linchpins were used in horse-drawn vehicles to prevent the wheels from coming off the axle. They are used for unstrained joints between parts, for example, as safety pins in hand grenades.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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* LYNCH PIN: Shirley Simmonds puts in a full working week as a volunteer (JH180412ENancy-01) * TRAILBLAZING: Examiner community awards nominee, Nancy Whitwam with volunteers Azra Khaliq and Rubina Jawed at Agewell, Birkby Croft, Birkby (JH180412ENancy-01) Purchase: 01484 430000 * BUZZ OUT OF HELPING : John Brooke (JH190412Cjohn-01)
Stewart and English were given 12 months' jail and Mylotte, described by Judge Cohen as the "lynch pin" behind the offences, 18 months.
LYNCH PIN: Hartshead battles on for Fergal Lynch to lift the Carlisle Bell
STEVE Carpenter, the lynch pin of Blaze's defence for the past three seasons has signed with Milton Keynes Lightning in the English Premier League.
Burn, who has yet to sign for a new club, has been named on the bench as understudy to Llyr Lane, who hurt his ankle against Gloucester, with lynch pin Ofisa Tonu'u ruled out with a leg injury and only 20-year-old Matthew Thomas as back-up.
In addition, he said, the fracture meant a bolt did not protrude far enough for a securing lynch pin to be fitted.
THE LYNCH PIN Sport's Kevin Lynch sees off the challenge of Ballywalter's Marty Adair during Saturday's Steel & Sons Cup 10-1 victory.
"I believe passionately that integrated moorland management, with grouse shooting as the lynch pin, can produce the greatest level of benefits for wildlife, landscape and local economies.
Cook has been the England lynch pin so often in the last 18 months, even in a one-day side that some argued he should not have been picked for, that his effort at the Premadasa Stadium hardly seemed out of the ordinary.
Anthony Lynch hopes this year won't be another nightmare at the hands of Kerry; LYNCH PIN Anthony Lynch hopes the Rebels can learn from past defeats; JUST CHAMPION Conor Counihan's side is the only provincial winner to make it to the All Ireland semi finals
It was almost 20 years ago that the Stockholm-born jock first took to the turntables and ever since establishing himself as a world-class producer with his remix of Robin S' Show Me Love in 1993 (which went on to become one of the best-selling dance records of all time) he has been a lynch pin of vocal house music.